Question: Concerned about the H1 output on the C31. The frequency is fine, but the voltage level sits between 2 and 3V. Does he need to pull it up or pull it down to 0 or 5V? Needs assistance.

Answer: TTL levels should be 0.6v to 2.4 (D/S page 14). If this is not the case, there may be extreme loading (>80pf) or the H1 drivers could be damaged.